CN114033867A

CN114033867A - Circulation liquid outlet system with switching function and circulation switching valve

Info

Publication number: CN114033867A
Application number: CN202111315763.1A
Authority: CN
Inventors: 陈友苗; 陈奎宏
Original assignee: Zhejiang Guanyi Pipe Industry Co ltd
Current assignee: Zhejiang Guanyi Pipe Industry Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-02-11
Anticipated expiration: 2041-11-08
Also published as: CN114033867B

Abstract

The invention belongs to the technical field of pipeline circulating systems, and particularly relates to a circulating liquid outlet system with a switching function and a circulating switching valve. The circulating liquid outlet system comprises a switching module, a functional module, a liquid inlet module and a using module, wherein the switching module comprises a circulating switching valve which comprises a valve body and a switching control mechanism, and the circulating switching valve is in an external liquid outlet state and an internal circulating state. The second channel is a variable channel, and if the second channel is in a liquid outlet state, the first liquid outlet end and the second liquid outlet end simultaneously discharge liquid, so that the water pressure of different positions of the whole pipeline can be basically the same. If a water heater is arranged between the first connecting end and the second connecting end, the water temperatures of different positions of the whole pipeline can be ensured to be basically the same. At the moment, the liquid is in an internal circulation state, and after passing through the second connecting end, the first channel, the second channel and the first connecting end in sequence, the liquid flows back to the second connecting end, so that internal circulation of hot water is realized, and quick discharge of hot water is ensured.

Description

Circulation liquid outlet system with switching function and circulation switching valve

Technical Field

The invention belongs to the technical field of pipeline circulating systems, and particularly relates to a circulating liquid outlet system with a switching function and a circulating switching valve.

Background

At present, a traditional hot water circulating system comprises a water heater and a traditional hot water pipeline, hot water enters from a water inlet end of the traditional hot water pipeline, and water returns from a water return end of the traditional hot water pipeline through a check valve. As is well known, the heat loss and the water flow resistance exist in the pipeline, and the longer the pipeline is, the greater the heat loss and the water flow resistance are, so that the water pressure and the water temperature close to the water inlet end are higher than those close to the water return end, and the use of the liquid outlet equipment far away from the water inlet end is not facilitated.

In addition, the traditional hot water circulation system also needs to be provided with an electromagnetic valve and a control circuit on a water return end, so that the water channel can be pressurized.

Disclosure of Invention

The invention aims to provide a circulating liquid outlet system and a circulating switching valve, which have simple structures, can realize circulation and ensure the pressure or temperature balance of each water outlet on a pipeline.

The purpose of the invention is realized as follows:

a circulation switching valve comprises a valve body, wherein the valve body is provided with a valve liquid inlet end, a first connecting end, a second connecting end, a first liquid outlet end and a second liquid outlet end, the valve liquid inlet end is communicated with the first connecting end, the first liquid outlet end is communicated with the second connecting end through a first channel, the second liquid outlet end is also communicated with the second connecting end through a second channel, first switching ports which are mutually communicated are arranged between the second channel and the first connecting end, and second switching ports which are mutually communicated are arranged between the second channel and the second connecting end;

be provided with switching control mechanism in the valve body, it includes:

the liquid inlet sealing piece is movably arranged at the liquid inlet end of the valve and is used for opening and closing the liquid inlet end of the valve;

the first sealing piece is movably arranged at the first switching port and is used for opening and closing the first switching port;

the second sealing piece is movably arranged at the second switching port and used for opening and closing the second switching port; and

the driving unit is used for controlling the positions of the liquid inlet sealing piece, the first sealing piece and the second sealing piece to enable the circulation switching valve to have a liquid outlet state and an inner circulation state;

in an internal circulation state, the liquid inlet sealing piece closes the liquid inlet end of the valve, the first sealing piece opens the first switching port, and the second sealing piece seals the second switching port;

when going out the liquid state, the feed liquor sealing member is opened the valve feed liquor end first sealing member is sealed first switching mouth, the second sealing member is opened the second switches the mouth.

Preferably, the driving unit comprises a linkage rod, and the first sealing element, the second sealing element and the liquid inlet sealing element are sequentially mounted on the linkage rod.

Preferably, the valve inlet port, the first switching port and the second switching port are coaxially arranged.

Preferably, the drive unit further includes a return spring for returning the circulation switching valve to the liquid-out state.

Preferably, the linkage rod is in the shape of a straight rod, one of the linkage rod is movably arranged in the guide hole of the valve body in a sliding mode, and the other end of the linkage rod is abutted to the liquid inlet end of the valve through a liquid inlet sealing piece and a return spring.

Preferably, the liquid inlet sealing element and the first sealing element each comprise an annular body and a sealing ring arranged on the outer ring of the annular body;

in addition, a liquid discharge gap is arranged between the liquid inlet sealing element and the inner wall of the liquid inlet end of the valve.

Preferably, the valve body is divided into a first valve body and a second valve body, the first valve body is provided with a first mounting end, a valve liquid inlet end and a first connecting end, the second valve body is provided with a second mounting end, a second connecting end, a first channel and a second channel, and the first mounting end and the second mounting end are connected with each other.

Preferably, an inner valve pipe and an outer valve pipe are coaxially arranged on the valve body, the inner valve pipe is positioned inside the outer valve pipe, and a pipe-in-pipe mounting end is formed;

wherein a first channel is formed in the inner valve tube, and a second channel is formed in the outer valve tube; or the inner valve tube forms a second channel, and the outer valve tube forms a first channel.

A circulation liquid outlet system with a switching function comprises:

the switching module comprises the circulation switching valve;

the functional module comprises a first pipeline and a circulating pump arranged on the first pipeline, and two ends of the first pipeline are respectively connected with a first connecting end and a second connecting end;

the liquid inlet module comprises a liquid inlet pipeline which is arranged at the liquid inlet end of the circulation switching valve or is arranged on the first pipeline; and

the using module comprises a second pipeline and at least one liquid outlet device arranged on the second pipeline, and two ends of the second pipeline are respectively connected with the first liquid outlet end and the second liquid outlet end.

Preferably, the functional module further comprises a water heater or/and a sterilizer arranged on the first pipeline;

in addition, the second pipeline is a pipe-in-pipe pipeline or a common pipeline.

Compared with the prior art, the invention has the outstanding and beneficial technical effects that:

1. a circulating pump is arranged between a first connecting end and a second connecting end of the circulating switching valve, a second pipeline is arranged between a first liquid outlet end and a second liquid outlet end of the circulating switching valve, and liquid outlet equipment is arranged on the second pipeline; the switching control mechanism is used for switching the circulation switching valve to an external liquid outlet state or an internal circulation state. The second channel is a variable channel, if the second channel is in a liquid outlet state, the first liquid outlet end and the second liquid outlet end simultaneously discharge liquid, namely the liquid inlet end and the water return end of the second pipeline simultaneously discharge liquid, and from the perspective of the whole second pipeline, the water pressures of different positions of the whole pipeline can be basically the same under the comprehensive action of the liquid inlet end and the water return end. If a water heater is arranged between the first connecting end and the second connecting end, the water temperatures of different positions of the whole pipeline can be ensured to be basically the same. At the moment, the liquid is in an internal circulation state, and after passing through the second connecting end, the first channel, the second channel and the first connecting end in sequence, the liquid flows back to the second connecting end, so that internal circulation of hot water is realized, and quick discharge of hot water is ensured.

2. The circulation switching valve is provided with a valve liquid inlet end for connecting a liquid inlet pipeline; the liquid inlet end of the valve is provided with a liquid inlet sealing piece, and when the valve is in an internal circulation state, the liquid inlet end of the valve can be sealed to play an isolation role.

3. The linkage rod simultaneously controls the position changes of the first sealing element, the second sealing element and the liquid inlet sealing element, the linkage mode simplifies the control structure of the driving unit, and the cost is saved.

4. The circulating switching valve can be reset to the liquid outlet state under the action of the reset spring or the water inlet pressure of the liquid inlet pipeline. Meanwhile, under the action of the circulating pump, the circulating switching valve can be switched to an internal circulation state, and the control is very convenient.

5. The circulating liquid outlet system can be provided with both pipe-in-pipe pipelines and common pipelines, has strong applicability, and is convenient for modification and upgrading of common families. In addition, the circulating liquid outlet system does not need to additionally arrange an electromagnetic valve and a control circuit on the water return end of the second pipeline, so that the structure is greatly simplified, and the cost is saved.

Drawings

Fig. 1 is a schematic structural view of a first circulation switching valve of the present invention in a liquid-out state.

Fig. 2 is a cross-sectional view of the second valve body at a-a in fig. 1.

Fig. 3 is a cross-sectional view of the second valve body at B-B in fig. 1.

Fig. 4 is a schematic structural view of the internal circulation state of the first circulation switching valve of the present invention.

Fig. 5 is an enlarged view of a portion of the inlet end of the valve at C in fig. 4.

Fig. 6 is a schematic structural view of a second circulation switching valve of the present invention in a liquid-out state.

Fig. 7 is a schematic structural view of the internal circulation state of the second circulation switching valve of the present invention.

Fig. 8 is a schematic structural view of a third circulation switching valve of the present invention.

Fig. 9 is a schematic structural view showing a fluid-out state of the fourth circulation switching valve of the present invention.

Fig. 10 is a schematic structural view of an internal circulation state of a fourth circulation switching valve of the present invention.

FIG. 11 is a schematic structural diagram of the first effluent system of the present invention in an effluent state.

FIG. 12 is a schematic structural view of the circulation state in the first liquid recycling system of the present invention.

FIG. 13 is a schematic structural diagram of the second effluent recycling system of the present invention in an effluent state.

FIG. 14 is a schematic structural diagram of the liquid outlet state of the third liquid recycling and discharging system of the invention.

FIG. 15 is a schematic structural diagram of the liquid outlet state of the fourth liquid outlet circulation system of the invention.

Fig. 16 is a schematic structural view of a conventional hot water circulation system.

The reference numerals in the figures denote the meanings:

1-a valve body; 1 a-a first valve body; 1 b-a second valve body; 2-a switching control mechanism; 3-valve cap;

11-a first connection end; 12-a second connection end; 13-a first liquid outlet end; 14-a first channel; 15-second liquid outlet end; 16-a second channel; 17-a first switching port; 18-a second switching port; 19-liquid inlet end of valve; 20-a pilot hole;

21-a first seal; 211-an annular body; 212-sealing ring; 22-a second seal; 23-a drive unit; 231-a linkage rod; 232-a return spring; 24-a liquid inlet seal; 25-liquid discharge gap;

31-a first mounting end; 32-a second mounting end; 33-inner valve tube; 34-an outer valve tube;

100-a switching module; 101-a circulation switching valve; 102-plug; 200-functional modules; 201-a first conduit; 202-a circulation pump; 203-a water heater; 204-a sterilizer; 205-water return electromagnetic valve; 301-liquid inlet line; 302-water inlet solenoid valve; 401-pipe-in-pipe line; 402-liquid outlet equipment; 403-normal piping; 4031-first water outlet; 4031-a second water outlet; 4031-third water outlet;

500-traditional hot water line; 501-water inlet end; 502-a return water end; 503-check valve.

Detailed Description

The invention is further described below with reference to specific examples:

embodiment one of the circulation switching valve:

as shown in fig. 1, a circulation switching valve includes a valve body 1, the valve body 1 is divided into a first valve body 1a and a second valve body 1b, both of which are T-shaped, the first valve body 1a has a first mounting end 31, a valve inlet end 19 and a first connecting end 11, which are communicated with each other, and the second valve body 1b has a second mounting end 32, a second connecting end 12, a first channel 14, a second channel 16, a first liquid outlet end 13 and a second liquid outlet end 15, which are communicated with each other. The end is internally hollow and externally provided with a connecting structure, for example: the first mounting end 31 is provided with an internal thread, the second mounting end 32 is provided with an external thread, and the two are hermetically connected through an O-shaped ring, so that a complete valve body 1 is formed.

The first connecting end 11 is communicated with the valve liquid inlet end 19, and the valve liquid inlet end 19 is used for installing a liquid inlet pipeline 301, generally a tap water pipeline, for cold water inlet. The first connecting end 11 and the second connecting end 12 are arranged on the same side and used for installing a first pipeline 201, and functional elements such as a circulating pump 202, a water heater 203 and a sterilizer 204 are arranged on the first pipeline 201.

The first liquid outlet end 13 is communicated with the second connecting end 12 through a first channel 14, the second liquid outlet end 15 is also communicated with the second connecting end 12 through a second channel 16, and the first liquid outlet end 13 and the second liquid outlet end 15 are used for connecting a second pipeline. A first switching port 17 which is communicated with each other is arranged between the second channel 16 and the first connecting end 11, and a second switching port 18 which is communicated with each other is arranged between the second channel 16 and the second connecting end 12.

Specifically, as shown in fig. 2 to 3, the second valve body 1b has an inner valve tube 33 and an outer valve tube 34 coaxially disposed, one end of the outer valve tube 34 is integrally formed on the second valve body 1b, and the other end thereof forms the second liquid outlet end 15. An inner pipe installation position which is always communicated with the second connecting end 12 is formed inside the second valve body 1b, an external thread is arranged at one end of the inner valve pipe 33, the inner pipe installation position is in threaded connection with the external thread, and the inner pipe installation position is located inside the outer valve pipe 34. The other end of the inner valve pipe 33 extends out of the second liquid outlet end 15 of the outer valve pipe 34 to form the first liquid outlet end 13, so that the connection with a pipe-in-pipe pipeline is facilitated. In this embodiment, the inner valve tube 33 forms the first passage 14 therein, and the inner valve tube 33 and the outer valve tube 34 form the second passage 16 therebetween. At this time, the first liquid outlet end 13 and the second liquid outlet end 15 together form a pipe-in-pipe installation position for directly connecting the pipe-in-pipe pipeline 401. The second pipeline in this embodiment is a pipe-in-pipe pipeline 401.

In addition, one side of the second channel 16 is communicated with a first mounting end 31, and the inner wall of the first mounting end 31 is provided with a first switching port 17 communicated with the first connecting end 11. The other side of the second channel 16 is connected to the second connection end 12 via a second switching port 18.

As shown in fig. 1, a switching control mechanism 2 including a driving unit 23, a first sealing member 21, a second sealing member 22, an intake sealing member 24, and a return spring 232 is provided in the valve body 1.

The first sealing member 21 is movably provided at the first switching port 17 for opening and closing the first switching port 17. The second sealing member 22 is movably disposed at the second switching port 18 for opening and closing the second switching port 18. The inlet seal 24 is movably disposed at the valve inlet end 19 for opening and closing the valve inlet end 19. In this embodiment, the liquid inlet sealing element 24 and the first sealing element 21 each include an annular body 211 and a sealing ring 212 disposed on an outer ring of the annular body 211; the second sealing member 22 is made of a sealing material such as rubber or silicone, and is annular or circular truncated cone-shaped.

The driving unit 23 is used for controlling the positions of the first sealing member 21, the second sealing member 22 and the liquid inlet sealing member 24, so that the circulation switching valve 101 has an outer liquid outlet state and an inner circulation state. In order to simplify the structure of the driving unit 23, the driving unit 23 includes a linkage rod 231, the linkage rod 231 is in a straight rod shape, one end of the linkage rod 231 is slidably and movably arranged in the guide hole 20 of the valve body 1, the other end of the linkage rod is provided with the liquid inlet sealing piece 24, and the liquid inlet sealing piece 24 abuts against an inner convex ring of the valve liquid inlet end 19 through a return spring 232. The return spring 232 is used for driving the linkage rod 231 to move and returning the circulation switching valve 101 to the liquid outlet state. Further, the circulation switching valve 101 may be set to the liquid discharge state by opening the liquid inlet port 19 by the water inlet pressure of the liquid inlet line 302. Thus, the return spring 232 can be selectively installed as desired, but if the valve inlet port 19 is not connected to the inlet line 302, i.e., there is no inlet pressure, then the return spring 232 is needed.

The middle part of the linkage rod 231 is also respectively provided with the first sealing element 21 and the second sealing element 22. That is, the second sealing member 22, the first sealing member 21, and the liquid inlet sealing member 24 are sequentially mounted on the linkage rod 231. In order to facilitate the installation of the linkage rod 231, the valve inlet 19, the first switching port 17, the second switching port 18 and the guide hole 20 are coaxially arranged.

When going out the liquid state, as shown in fig. 1, under the effect of reset spring 232 or the pressure of intaking, gangbar 231 inwards moves, is close to the direction removal of guiding hole 20 in fig. 1 promptly, makes first sealing member 21 closes first switching port 17, second sealing member 22 opens second switching port 18, liquid inlet sealing member 24 opens valve inlet 19. At this time, the liquid passes through the valve liquid inlet end 19, the first connecting end 11 and the second connecting end 12 in sequence, and then flows out from the first liquid outlet end 13 and the second liquid outlet end 15 simultaneously, so that the liquid is discharged outside.

In the internal circulation state, as shown in fig. 4, under the action of the circulation pump 202, the linkage rod 231 moves outwards, i.e. in the direction away from the guide hole 20 in fig. 1, so that the first sealing member 21 opens the first switching port 17, the second sealing member 22 closes the second switching port 18, and the liquid inlet sealing member 24 closes the valve liquid inlet end 19. At this time, the liquid flows back to the second connection end 12 after passing through the second connection end 12, the first channel 14, the second channel 16, and the first connection end 11 in sequence, thereby realizing internal circulation.

In this embodiment, the second channel 16 is a variable channel, and when the liquid is discharged from the outside, the water flow direction of the second channel 16 is that the second connection end 12 flows to the second liquid outlet end 15; in the internal circulation state, the water flow direction of the second channel 16 is just opposite, that is, the second liquid outlet end 15 flows to the second connecting end 12. Therefore, the second pipeline can be greatly optimized, and the water pressure and the water quantity of each water outlet of the second pipeline are more balanced. In addition, the pipe diameter can be reduced and the material can be saved when the same purpose is achieved.

For the purpose of illustrating the principle, a bonnet 3 is added to the pipe-in-pipe line 401 for communicating the first passage 14 and the second passage 16, i.e., the first outlet port 13 and the second outlet port 15 communicate with each other.

In addition, a liquid discharge gap 25 is arranged between the liquid inlet sealing piece 24 and the inner wall of the liquid inlet end 19 of the valve, and the liquid discharge gap 25 is generally 0.2 mm. When the liquid inlet sealing piece 24 enters the inner wall of the liquid inlet end 19 of the valve when the internal circulation state is switched, liquid on the moving path of the liquid inlet sealing piece 24 can enter the first connecting end 11 through the liquid discharge gap 25, and the liquid inlet sealing piece 24 is prevented from entering the inner wall of the liquid inlet end 19 of the valve due to the fact that the liquid cannot flow everywhere. At the same time, the drainage gap 25 can also be replaced by drainage holes, which can be made directly in the annular body 211 of the inlet seal 24.

Example two of the circulation switching valve:

as shown in fig. 6-7, this embodiment is substantially the same as the first embodiment, except that the return spring 232 is omitted in this embodiment, because the inlet port 19 of the valve can be opened under the action of the inlet pressure of the inlet line 302, so as to place the circulation switching valve 101 in the outlet state.

In addition, in this embodiment, the second valve body 1b has an inner valve tube 33 and an outer valve tube 34 coaxially disposed, one end of the outer valve tube 34 is integrally formed on the second valve body 1b and is always communicated with the second connection end 12, and the other end of the outer valve tube 34 forms the first liquid outlet end 13. An inner pipe installation position is arranged inside the second valve body 1b, an external thread is arranged at one end of the inner valve pipe 33, the inner valve pipe 33 is in threaded connection with the inner pipe installation position and is located inside the outer valve pipe 34. The other end of the inner valve pipe 33 extends out of the first liquid outlet end 13 of the outer valve pipe 34 and forms the second liquid outlet end 15. At this time, the first liquid outlet end 13 and the second liquid outlet end 15 together form a pipe-in-pipe installation position for directly connecting the pipe-in-pipe pipeline 401.

The second passage 16 is formed in the inner valve tube 33, and the first passage 14 is formed between the inner valve tube 33 and the outer valve tube 34. The first liquid outlet end 13 is communicated with the second connecting end 12 through a first channel 14, the second liquid outlet end 15 is also communicated with the second connecting end 12 through a second channel 16, a first switching port 17 which is communicated with each other is arranged between the second channel 16 and the first connecting end 11, and a second switching port 18 which is communicated with each other is arranged between the second channel 16 and the second connecting end 12.

The difference between this embodiment and the first embodiment is: in the internal circulation state, in this embodiment, the outer flow passage of the pipe-in-pipe pipeline 401 circulates hot water to the inner flow passage; in one embodiment, the inner flow path of the pipe-in-pipe 401 is directed to the outer flow path for hot water circulation.

Cycle switching valve example three:

as shown in fig. 8, this embodiment is substantially the same as the second embodiment, except that the guide holes 20 are omitted in this embodiment. In this embodiment, no matter how the linkage rod 231 moves, the first sealing member 21 or the second sealing member 22 is always located on the inner wall of the valve body to play a role of positioning and guiding.

Preferably, the valve inlet port 19, the first switching port 17, the second switching port 18 and the second connection port 12 are coaxially arranged.

Cycle switching valve example four:

as shown in fig. 9-10, the present embodiment is substantially the same as the first embodiment, and the difference is that the valve body 1 of the present embodiment is integrally formed, and the first liquid outlet end 13 and the second liquid outlet end 15 are respectively disposed at one side of the valve body 1 for installing a common pipeline 403.

Example v of the circulation switching valve:

this embodiment is substantially the same as the first embodiment, except that the present embodiment does not require the valve inlet port 19 and the inlet seal 24, and corresponds to the circulation switching valve having no function of connecting the inlet pipe.

Cycle switching valve example six:

this embodiment is basically the same as the first embodiment, and the difference is that the switching control mechanism 2 includes three switching solenoid valves, which respectively control the opening and closing of the valve liquid inlet 19, the first switching port 17 and the second switching port 18, and realize linkage through circuit control, thereby realizing the switching between the liquid outlet state and the internal circulation state.

First embodiment of the circulation liquid outlet system:

as shown in fig. 11, a recycling system with switching function includes a switching module 100, a functional module 200, a liquid inlet module, and a usage module.

The switching module 100 includes a circulation switching valve 101 according to any one of the first, second, third, fifth and sixth embodiments, and is configured to switch the circulation draining system between an external draining state and an internal circulation state. The circulation switching valve 101 of the present embodiment is preferably configured as in the first embodiment, and is not provided with a return spring.

The functional module 200 comprises a first pipeline 201, and a circulation pump 202 and a water heater 203 which are arranged on the first pipeline 201, the water heater 203 generally comprises a zero-cold-water heater, an unpressurized water heater and the like, and two ends of the first pipeline 201 are respectively connected with a first connecting end 11 and a second connecting end 12.

The liquid inlet module comprises a liquid inlet pipeline 301, which is arranged at the valve liquid inlet end 19 of the circulation switching valve 101 or is installed on the first pipeline 201, and the liquid inlet pipeline is installed at the valve liquid inlet end 19 in the embodiment.

The using module comprises a second pipeline and at least one liquid outlet device 402 arranged on the second pipeline, the liquid outlet device 402 is generally a faucet, a shower head and the like, and two ends of the second pipeline are respectively connected with the first liquid outlet end 13 and the second liquid outlet end 15. In this embodiment, the first liquid outlet end 13 and the second liquid outlet end 15 are coaxially arranged and form a pipe-in-pipe installation position, the second pipeline is a pipe-in-pipe pipeline 401, the pipe-in-pipe pipeline 401 includes an inner pipe and an outer pipe which are coaxially arranged, an inner flow channel is formed in the inner pipe, an outer flow channel is formed between the inner pipe and the outer pipe, one end of the pipe-in-pipe pipeline 401 is connected to the pipe-in-pipe installation position, so that the inner flow channel is communicated with the first channel, and the outer flow channel is communicated with the second channel; the other end of the pipe-in-pipe pipeline 401 is provided with a liquid outlet device or a valve cap 3, so that the inner flow passage and the outer flow passage are communicated with each other, and liquid can be discharged conveniently in a circulating mode or simultaneously.

As shown in fig. 11, the liquid outlet circulation system is in a liquid outlet state.

When the liquid outlet state is realized, under the action of water inlet pressure, the linkage rod 231 moves inwards, so that the first sealing element 21 closes the first switching port 17, the second sealing element 22 opens the second switching port 18, and the liquid inlet sealing element 24 opens the valve liquid inlet end 19. At this time, the cold water sequentially enters the water heater through the valve inlet end 19 and the first connection end 11 to be heated, then the hot water enters the second connection end 12 through the circulating pump 202, and simultaneously enters the inner flow channel and the outer flow channel of the pipe-in-pipe pipeline from the first liquid outlet end 13 and the second liquid outlet end 1, so that the liquid outlet of the liquid outlet device 402 is realized.

As shown in fig. 12, the liquid recycling system is in an internal circulation state.

In the internal circulation state, when the liquid outlet device 402 does not work, the circulation pump 202 is started in a timing circulation mode, and under the action of water pressure, the linkage rod 231 moves outwards, so that the first sealing element 21 opens the first switching port 17, the second sealing element 22 closes the second switching port 18, and the liquid inlet sealing element 24 closes the liquid inlet end 19 of the valve. At this time, the hot water of the water heater flows back to the water heater after passing through the second connecting end 12, the first channel 14, the inner flow passage, the outer flow passage, the second channel 16 and the first connecting end 11 in sequence, so that the inner circulation is realized, the water temperature of the pipeline is ensured, and the hot water can be quickly used as soon as a user opens the liquid outlet device.

The present embodiment belongs to a pipe-in-pipe hot water circulation system, and realizes hot water circulation and hot water fast-out function through the switching module 100.

Second embodiment of the circulating liquid discharging system:

as shown in fig. 13, the present embodiment is substantially the same as the embodiment of the recycling liquid system, and the difference is that the functional module 200 includes a sterilizer 204 disposed on the first pipeline 201, and the sterilizer 204 is an ultraviolet sterilizer or the like, and is mainly used for sterilizing cold water and is generally disposed in a drinking water system.

The embodiment belongs to a pipe-in-pipe cold water circulating sterilization system, and cold water circulating sterilization and cold water using functions are realized through the switching module 100. When the water is in the liquid outlet state, the water-saving sterilizing device is mainly used for sterilizing cold water in the liquid inlet pipeline 301 and killing harmful substances such as bacteria in tap water; when the device is in an internal circulation state, the device is mainly used for sterilizing cold water in a circulating liquid outlet system and killing harmful substances such as bacteria in the pipe-in-pipe pipeline 401.

Third embodiment of the circulating liquid discharging system:

as shown in fig. 14, the present embodiment is substantially the same as the first embodiment of the recycling draining system, and the difference is that the second pipeline is a common pipeline 403, one end of the common pipeline 403 is communicated with the first draining end 13, and the other end is communicated with the second draining end 15. A plurality of liquid outlet devices 403 are arranged on the common pipeline 403.

The present embodiment belongs to a hot water circulation system with a common pipeline, and realizes hot water circulation and hot water fast-out function through the switching module 100. A first water outlet 4031, a second water outlet 4032 and a third water outlet 4033 for installing the liquid outlet equipment 403 are sequentially arranged on the common pipeline 403; the first water outlet 4031 is close to the first liquid outlet end 13, the third water outlet 4033 is close to the second liquid outlet end 15, and the second water outlet 4032 is located in the middle of the pipeline.

As shown in fig. 16, the conventional hot water circulation system includes a water heater and a conventional hot water pipe 500, wherein a water inlet end 501 of the conventional hot water pipe 500 is supplied with hot water, and a water return end 502 thereof is returned with water through a check valve. The traditional hot water pipeline is also sequentially provided with a first water outlet 4031 ', a second water outlet 4032 ' and a third water outlet 4033 ' for mounting liquid outlet equipment, wherein the first water outlet 4031 ' is close to the water inlet end, and the third water outlet 4033 ' is close to the water return end. As is well known, the longer the pipeline, the greater the heat loss and the greater the water flow resistance, which results in that the water pressure and the water temperature near the water inlet end are higher than those near the water return end, that is, the water pressure and the water temperature of the first water outlet 4031 'are higher than those of the second water outlet 4032', and the water pressure and the water temperature of the second water outlet 4032 'are higher than those of the third water outlet 4033', which is not beneficial for the use of the liquid outlet device 403 far from the water inlet end 501. In addition, the traditional hot water circulation system also needs to be provided with an electromagnetic valve and a control circuit on the water return end 502 to realize the pressurization of the water channel.

In this embodiment, two ends of the common pipe 403 are respectively connected to the first liquid outlet end 13 and the second liquid outlet end 15, and have a water outlet capability, so that each water outlet is connected to the first liquid outlet end 13 and the second liquid outlet end 15. The closer the water outlet is to the corresponding liquid outlet end, the larger the influence of the liquid outlet end on the water outlet is, and the smaller the influence of the other liquid outlet end is, so that the water pressure and the water temperature of each water outlet can be effectively guaranteed to be more or less balanced, and the difference is not as large as the traditional difference.

For example, the first water outlet 4031 is close to the first liquid outlet end 13, and the liquid outlet condition is mainly determined by the hot water at the first liquid outlet end 13 and assisted by the hot water at the second liquid outlet end 15. The third water outlet 4033 is close to the second liquid outlet end 15, so the liquid outlet condition is mainly determined by the hot water at the second liquid outlet end 15 and assisted by the hot water at the first liquid outlet end 13. The second water outlet 4032 in the middle of the common pipe 403 is provided with a first water outlet end 13 and a second water outlet end 15, which are used for supplying hot water. In a comprehensive way, the water pressure and the water temperature of each water outlet are balanced, and the use experience of a user is increased.

In addition, the circulating pump has a pipeline pressurization function, and an electromagnetic valve and a control circuit do not need to be additionally arranged on a water return end, so that the cost is saved.

The fourth embodiment of the circulating liquid outlet system:

as shown in fig. 15, the third embodiment is basically the same as the circulating draining system embodiment, and the difference is that the water heater of the present embodiment is an unpressurized water heater.

The liquid inlet pipeline 301 is installed on the first pipeline 201, and is provided with a water inlet electromagnetic valve 302 for controlling liquid inlet. At this time, a plug 102 may be installed at the valve inlet end 19 to perform a sealing function. At this time, a return spring 232 is required to be installed in the inlet end 19 of the valve.

Preferably, a water return solenoid valve 205 is arranged between the first connecting end and the first pipeline 201, and is used for controlling water return.

Further, the circulation switching valve 101 of the valveless liquid inlet 19, that is, the circulation switching valve 101 of the fifth embodiment may be selected.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A circulation switching valve characterized by: the valve comprises a valve body (1), wherein the valve body (1) is provided with a valve liquid inlet end (19), a first connecting end (11), a second connecting end (12), a first liquid outlet end (13) and a second liquid outlet end (15), the valve liquid inlet end (19) is communicated with the first connecting end (11), the first liquid outlet end (13) is communicated with the second connecting end (12) through a first channel (14), the second liquid outlet end (15) is also communicated with the second connecting end (12) through a second channel (16), a first switching port (17) which is communicated with each other is arranged between the second channel (16) and the first connecting end (11), and a second switching port (18) which is communicated with each other is arranged between the second channel (16) and the second connecting end (12);

be provided with switching control mechanism (2) in valve body (1), it includes:

the liquid inlet sealing piece (24) is movably arranged at the liquid inlet end (19) of the valve and is used for opening and closing the liquid inlet end (19) of the valve;

a first seal member (21) movably provided at the first switching port (17) for opening and closing the first switching port (17);

a second seal (22) movably arranged at the second switching port (18) for opening and closing the second switching port (18); and

a driving unit (23) for controlling the positions of the liquid inlet sealing piece (24), the first sealing piece (21) and the second sealing piece (22) to enable the circulation switching valve (101) to have an outer liquid outlet state and an inner circulation state;

in an internal circulation state, the liquid inlet sealing piece (24) closes the valve liquid inlet end (19), the first sealing piece (21) opens the first switching port (17), and the second sealing piece (22) closes the second switching port (18);

when going out the liquid state, feed liquor sealing member (24) are opened valve feed liquor end (19), first sealing member (21) are closed first switching mouth (17), second sealing member (22) are opened second switching mouth (18).

2. A circulation switching valve according to claim 1, wherein: the driving unit (23) comprises a linkage rod (231), and the first sealing piece (21), the second sealing piece (22) and the liquid inlet sealing piece (24) are sequentially arranged on the linkage rod (231).

3. A circulation switching valve according to claim 2, wherein: the valve inlet (19), the first switching port (17) and the second switching port (18) are coaxially arranged.

4. A circulation switching valve according to claim 3, wherein: the drive unit (23) further comprises a return spring (232) for returning the circulation switching valve (101) to a liquid-out state.

5. The circulation switching valve according to claim 4, wherein: the linkage rod (231) is in a straight rod shape, one of the linkage rod is movably arranged in the guide hole (20) of the valve body (1) in a sliding mode, and the other end of the linkage rod is abutted to the liquid inlet end (19) of the valve through a liquid inlet sealing piece (24) and a return spring (232).

6. A circulation switching valve according to claim 1, wherein: the liquid inlet sealing element (24) and the first sealing element (21) respectively comprise an annular body (211) and a sealing ring (212) arranged on the outer ring of the annular body (211);

in addition, a liquid discharge gap (25) is arranged between the liquid inlet sealing piece (24) and the inner wall of the liquid inlet end (19) of the valve.

7. A circulation switching valve according to any one of claims 1 to 6, wherein: the valve body (1) is divided into a first valve body (1a) and a second valve body (1b), the first valve body (1a) is provided with a first mounting end (31), a valve liquid inlet end (19) and a first connecting end (11), the second valve body (1b) is provided with a second mounting end (32), a second connecting end (12), a first channel (14) and a second channel (16), and the first mounting end (31) and the second mounting end (32) are connected with each other.

8. A circulation switching valve according to any one of claims 1 to 6, wherein: an inner valve pipe (33) and an outer valve pipe (34) are coaxially arranged on the valve body (1), the inner valve pipe (33) is positioned inside the outer valve pipe (34) and forms a pipe-in-pipe mounting end;

wherein a first channel (14) is formed in the inner valve tube (33) and a second channel (16) is formed in the outer valve tube (34); alternatively, the first and second electrodes may be,

the inner valve tube (33) forms a second channel (16) therein, and the outer valve tube (34) forms a first channel (14) therein.

9. A circulation play liquid system with switch function which characterized in that includes:

a switching module (100) comprising the circulation switching valve (101) of any one of claims 1-8;

the functional module (200) comprises a first pipeline (201) and a circulating pump (202) arranged on the first pipeline (201), wherein two ends of the first pipeline (201) are respectively connected with a first connecting end (11) and a second connecting end (12);

the liquid inlet module comprises a liquid inlet pipeline (301) which is arranged at a valve liquid inlet end (19) of the circulation switching valve (101) or is arranged on the first pipeline (201); and

the using module comprises a second pipeline and at least one liquid outlet device (402) arranged on the second pipeline, wherein two ends of the second pipeline are respectively connected with a first liquid outlet end (13) and a second liquid outlet end (15).

10. The system of claim 9, wherein the system further comprises: the functional module (200) further comprises a water heater (203) or/and a sterilizer (204) arranged on the first pipeline (201);

in addition, the second pipeline is a pipe-in-pipe pipeline (401) or a common pipeline (403).